^ ROFL at your last comment.
If the ix had been available when I'd been looking for an RLC/speed-camera warning device, I honestly don't know. That would have made my choice much harder, and I think that I'd very likely have then first purchased the ix...and that if I didn't like the way which it warned of threats, switched over to the Cheetah units.
Now, with the GPS-Mirror, I simply find no need to upgrade to the ix - as the GPS-Mirror not only fills that role, but also provides ancillary benefits (I like/prefer the wide-angle view, as well as the glare-reduction).
I don't think that the GPS-Mirror is as likely to be stolen as a much more noticeably and readily removable standalone detector, but this is still worth some extra thought, particularly as it seems to be a hot "industry" in your area.
Indeed, getting the detector, which you could just remove and slip into your pocket as you exit the vehicle, may prove to be the better choice.
In the end, you're exactly right - it's all down to personal choice and preferences.
I take the view that, at this level of the game, *all* of the available equipment is easily worth their purchase price, and will serve the end-user very, very well - and that it's only the personal biases that will swing the vote, one way or the other.